Attitude indicator having expanded scale

Details Attitude indicator having expanded scale Attitude indicator having expanded scale

1976-10-07

1979-02-06

Caldwell, Sr., John W.

Communications: electrical

Selective

Having indication or alarm

318654, 340 27NA, 340198, G08C 1948

Patent

active

041386612

ABSTRACT:
A roll and pitch servomechanism for use in an attitude indicator is shown having an expanded scale in which a nonlinear electrical circuit is combined with a nonlinear mechanical indicator to produce an accurate indication of pitch attitude over an expanded range. The circuit includes an operational amplifier circuit connected in one leg of a balancing circuit which is connected in a delta configuration across the windings of a control transformer whose windings are connected in a Y-configuration.

REFERENCES:
patent: 2810119 (1957-10-01), Brown
patent: 2950460 (1960-08-01), Seifried et al.
patent: 3162834 (1964-12-01), Schweighofer et al.
patent: 3530345 (1970-09-01), Ibrahim et al.
patent: 3537086 (1970-10-01), Andreson
patent: 3617863 (1971-11-01), Espen
patent: 3636428 (1972-01-01), Yanosik
patent: 3639850 (1972-02-01), Brooks
patent: 3719880 (1973-03-01), Boynton et al.
patent: 3737885 (1973-06-01), Hedrick
patent: 3870940 (1975-03-01), Espen
patent: 3961212 (1976-06-01), McAdams

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